From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from host-181-75-169-83.static.internet-fr.net ([83.169.75.181]:34699 "EHLO seanodes.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751284AbYKSQ1E (ORCPT ); Wed, 19 Nov 2008 11:27:04 -0500 Message-ID: <49243E53.10309@seanodes.com> Date: Wed, 19 Nov 2008 17:26:59 +0100 From: Erwan Velu MIME-Version: 1.0 Subject: Inconsency between cli output and gnuplot Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: fio-owner@vger.kernel.org List-Id: fio@vger.kernel.org To: fio@vger.kernel.org My 1.23 fio ouput display : read : io=32,003MiB, bw=131MiB/s, iops=1,362, runt=250326msec slat (usec): min=13, max=145, avg=16.69, stdev= 3.39 clat (msec): min=31, max=129, avg=46.94, stdev= 7.24 clat output of gnuplot reports units in msec. The clat gnuplot output show a msec label on the y axis but trace some usec. slat cli reports values that doesn't match at all what is viewable from gnuplot output. Averagage is said to be 16 on the cli whereas the gnuplot trace shows 20 at min. Max is said to be 145 for slat but displayed at 60 on the gnuplot. Slat is also said to be usec on the cli but shown as msec on the y axis of the gnuplot. Complete archive showing that could be downloaded at http://konilope.linuxeries.org/tmp/localr.tar.bz2 It seems that units may vary from the cli output regarding the range of results. I have some case where clat is shown in usec instead of msec. Maybe that what confuse the gnuplot output. Like in : write: io=32,003MiB, bw=124MiB/s, iops=1,294, runt=263681msec slat (usec): min=12, max=71, avg=15.43, stdev= 2.72 clat (usec): min=663, max=1,537K, avg=49431.63, stdev=108787.82 bw (KiB/s) : min= 0, max=171311, per=99.91%, avg=127152.93, stdev=21619.46 -- Erwan Velu Pre-Sales Engineer Seanodes http://www.seanodes.com +33 (0)1 41 22 13 83